|
Fair Value, Option, Gains and Losses (Details) (USD $)
In Millions, unless otherwise specified
|
12 Months Ended |
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
Mortgage banking noninterest income [Member] | Mortgages held for sale [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
$ 8,240 |
$ 6,084 |
$ 6,512 |
|
Mortgage banking noninterest income [Member] | Loans held for sale [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
0 |
0 |
0 |
|
Mortgage banking noninterest income [Member] | Loans Receivable [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
0 |
13 |
55 |
|
Mortgage banking noninterest income [Member] | Long-term debt [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
0 |
(11) |
(48) |
|
Mortgage banking noninterest income [Member] | Other interests held [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
0 |
0 |
0 |
|
Other noninterest income [Member] | Mortgages held for sale [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
1 |
0 |
0 |
|
Other noninterest income [Member] | Loans held for sale [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
21 |
32 |
24 |
|
Other noninterest income [Member] | Loans Receivable [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
63 |
80 |
0 |
|
Other noninterest income [Member] | Long-term debt [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
(27) |
0 |
0 |
|
Other noninterest income [Member] | Other interests held [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
34 |
0 |
0 |
|
Net gains (losses) from trading activities [Member] | Mortgages held for sale [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
0 |
0 |
0 |
|
Net gains (losses) from trading activities [Member] | Loans held for sale [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
0 |
0 |
0 |
|
Net gains (losses) from trading activities [Member] | Loans Receivable [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
0 |
0 |
0 |
|
Net gains (losses) from trading activities [Member] | Long-term debt [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
0 |
0 |
0 |
|
Net gains (losses) from trading activities [Member] | Other interests held [Member]
|
|
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] |
|
|
|
| Gains (Losses) on changes in fair value |
$ (42) |
$ (25) |
$ (13) |